Metroid: Zero Mission Redux is a Improved version of Vanilla ZM for the 20th birthday of the said game a bit early
the goal is simply to fix things , restauring others from beta and older game , trying to gave a better expérience than the 2004 game

Most notable change are:

-Easy Mode gave more ammo for tanks (350 Missile , 45 super and 27 power bombs max)
-Charge beam is tracting drop like in the prime series + charge gfx is based on the beta version
-Wall jump and others thing are executing faster / with less lag.
-Unknown items are completely optionnal.
-Marron / reddish outline are gone.
-a bunch of hex tweak to make the game better in someway.
-and way more said in the readme file , listed with known issue.

Update will come soon enough for adding others stuff more or less important and others fix
in the future.